Sheldon Adelson, the billionaire chairman and CEO of Las Vegas Sands Corp., spent more than six hours on the witness stand Tuesday and repeatedly expressed his disdain for the former executive who brought him there.

Adelson said he never wanted to hire Steven Jacobs, the former president of Sands Macau who later filed a wrongful termination case against him. The witness said Jacobs had no experience running a company and nearly ruined Sands China Ltd. “many times.”

“He was one of the least competent and potentially destructive executives I had in over 50 companies in my 69-year business career,” Adelson said. “He only worked for the company for one year.”

Jacobs sued Sands China and Las Vegas Sands in 2010, shortly after he was fired. He later added Adelson as a defendant in the case.